find the summation of a given input

n = int(input('n = '))
k = 1
i = 10
while(1):
    n / i
    k = k + 1
    i = i * 10
    if((n//i) == 0):
        break
print('number of integers = ',k)
a = 0
s = 0
for j in range(1,k+1,1):
    a = n // 10 ** (k-j)
    s = s + a
    n = n - a * (10**(k-j))

print('summation of the number of integers = ',s)